1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076d3c63d9f5549070b3ff957b15503cad425b3bc5de496a6278ba3011a223ed. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ce85968-2d46-4c44-a7b3-47d6eb3d856c.json and https://artists.proofprofile.net/proofs/artist/6ce85968-2d46-4c44-a7b3-47d6eb3d856c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8d9aacfea67a970736a865bc97785a1c55873652a4f2368c9a3d8707f19531. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dc999f74c8170a5e53df384ccbe6081a11c05f3263c36cf87efd3ca5762edd. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fea179bd141e04c104e889ed2ef7112f28d205290f024ebae7ef67614d37c2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647478fc16ed4cd6b9208282f2f0cf4231660e939f7bfba5b87a86d0d38bf2fc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1db6aab29f587a502db122d4b393bedead6f3b67e5d34879806096ad2ec1bad. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00aba7d9a753ee64732f51a7aa8012d329455be57d3faef04c233d281e60fc89. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3150d377686880e0d9bf7a96f3e5a060f1dc96028114b6946bf4fd207e0be03. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b36a6a3b79b17c84c9220b281dbd6e7a858c60e8d569c5e9727863ecc46a79e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56dde32fbea6e4eeb01919d8adf8b8d0a65836c5e983ea3400139f63e7111d2. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0374016bc0106ddaa5090c109c8705161d32f80aa897c7007795940e675102c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc5f63d781a7a3a672943cfb5216206460f79d085b23fe045a9632eb438b04a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a97aa4e5015fa6d7c068407af88c7a6860c3337abbe0f00272967b9ca1d7b3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331440312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd407695da56ff71ece72735b2f9758bfb74cd370cbc77f3920e9f5a6ebff0409. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331227401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6330f5cdd034502cf55356d3962962c8abaa462593c8c84ba94e803e0adedfc. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331227402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84989f3f2fbb88625e1000b8109c4bca97852125a507d080a461fc6c9d61890. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331227403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251af1c0e6be262830f53bb7842c98cd1294402bea3f7e1063c12298ba4e5198. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331227404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e8c62de3f0c86c530a54fcc6c4556d182e58be3f591a59ec311a4e070b1712. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331227406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ce6f9887ea3dae3e3cabd358ba74270688716f5a48dd240fedc97570f4c382. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331227407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23712d8a2e1666cad1429f41d3cc9da61bde05872039c5b8b7bf67f9b99ea0e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPI291173709.